Execute when the command is called.
Activate the specific BSpline tracker.
References test.ui, Gui::Dialog::Clipping::Private.ui, Gui::Dialog::DlgAddProperty.ui, Gui::TaskBoxPosition.ui, Gui::Dialog::DlgProjectInformationImp.ui, Gui::Dialog::DlgGeneralImp.ui, Gui::Dialog::DlgSettings3DViewImp.ui, Gui::ElementColors::Private.ui, Gui::Dialog::TextureMapping.ui, Gui::Dialog::DlgSettingsNavigation.ui, Gui::Dialog::DlgCustomCommandsImp.ui, Gui::Dialog::DlgSettingsEditorImp.ui, Gui::Dialog::DlgDisplayPropertiesImp::Private.ui, Gui::Dialog::DlgParameterFind.ui, Gui::TaskBoxAngle.ui, Gui::Dialog::DlgCustomKeyboardImp.ui, Gui::Dialog::DlgWorkbenchesImp.ui, Gui::Dialog::DlgMacroExecuteImp.ui, Gui::TaskView::TaskAppearance.ui, Gui::Dialog::DlgMaterialPropertiesImp.ui, Gui::Dialog::DlgInputDialogImp.ui, Gui::Dialog::DlgExpressionInput.ui, Gui::Dialog::DlgMacroRecordImp.ui, Gui::Dialog::DemoMode.ui, Gui::Dialog::DlgSettingsColorGradientImp.ui, Gui::DlgObjectSelection.ui, Gui::Dialog::DlgCustomizeSpNavSettings.ui, Gui::Dialog::DlgProjectUtility.ui, Gui::Dialog::DlgInspector.ui, Gui::Dialog::DlgActivateWindowImp.ui, Gui::Dialog::DlgCustomActionsImp.ui, Gui::Dialog::DlgReportViewImp.ui, Gui::Dialog::DlgSettingsMacroImp.ui, Gui::Dialog::DlgSettingsViewColor.ui, Gui::Dialog::Placement.ui, Gui::Dialog::DlgSettingsUnitsImp.ui, Gui::Dialog::DownloadManager.ui, Gui::Dialog::DlgSettingsDocumentImp.ui, Gui::TaskView::TaskSelectLinkProperty.ui, Gui::Dialog::DlgOnlineHelpImp.ui, Gui::Dialog::DlgPropertyLink.ui, Gui::Dialog::DlgRunExternal.ui, Gui::Dialog::DlgUnitsCalculator.ui, Gui::Dialog::IconDialog.ui, Gui::Dialog::DlgParameterImp.ui, draftguitools.gui_base_original.DraftTool.ui, Gui::Dialog::DlgCustomToolbars.ui, Gui::Dialog::DlgSettingsImageImp.ui, Gui::Dialog::DlgCheckableMessageBoxPrivate.ui, Gui::Dialog::AboutDialog.ui, Gui::Dialog::Transform.ui, Gui::Dialog::DlgPreferencesImp.ui, Gui::Dialog::DocumentRecoveryPrivate.ui, Gui::CheckListDialog.ui, Gui::LocationDialogImp< Ui >.ui, Gui::LocationImpUi< Ui >.ui, and Gui::LocationDialogUiImp.ui.